Mar writes: “I’m a pharmacist, and I’m doing a Biomedicine Phd. When I began the PhD I decided to have a tattoo. When I was little I used to rest for long times apparently doing nothing. My mother always told me, ‘Leave the atoms and come to the Earth.'”

Click here to go to the full Science Tattoo Emporium. 

Originally published February 13, 2009. Copyright 2009 Carl Zimmer.